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Biology
total weight of living material at each trophic level
organism, such as fungus or bacteria, that breaks down and absorbs nutrients from dead organisms
organism that consumes another organism, absorbing its tissue through the consumption
organism that is consumed by another organism
symbiotic relationship in which one organism benefits at the expense of another, usually another species
organism that harbors a parasite
symbiotic relationship in which one organism benefits and the other is neither harmed nor benefitted
symbiotic relationship in which both organisms benefit
growth that starts slow, increases sharply indefinitely
growth that starts slow, increases sharply, slows, then tapers off to a specific level
the number of organisms of one species that an environment can support indefinitely
phenomenon that occurs when certain gases in the atmosphere trap infrared radiation
group of organisms all of the same species, which interbreed and live in the same place at the same time
pattern of any process or related processes which affect growth or change within a population
process of analyzing an entire population based on a representative sample of that population
represents the total available energy at each trophic level
represents the quantity of organisms consumed at each trophic level by the level above it
represents the total dry weight of living material available at each trophic level
continuous movement of a chemical element or molecule on, above and below the surface of the Earth
continuous movement of carbon on, above and below the surface of the Earth
continuous movement of nitrogen on, above and below the surface of the Earth
continuous movement of water on, above and below the surface of the Earth
scientific study of interactions between organisms and their environments
interactions among populations in a community
orderly, natural changes and species replacements that take place in communities of an ecosystem over time
endpoint stage of succession in which all species present reproduce in proportion to one another and no further change occurs
role or position a species has in its environment
place where an organism lives out its life
collection of several interacting populations in a certain area at a certain time
portion of Earth that supports life
nonliving parts of an organism's environment
all the living organisms that inhabit an environment
organisms that use energy from the sun or energy stored in chemical compounds to manufacture their own nutrients
organisms that cannot make their own food and must feed on other organisms for energy and nutrients
heterotroph that feeds only on plants
heterotroph that eats only other heterotrophs
heterotroph that feeds on both plants and other heterotrophs
heterotroph does not kill for food, but feeds on the remains of animals that have already died
chemical that an organism needs in order to live and grow
movement of conserved energy throughout an ecosystem
movement of conserved matter throughout an ecosystem
simple model that shows how matter and energy move through an ecosystem (single path)
model that shows all possible feeding relationships at each trophic level in a community
organism that represents a feeding step in the movement of energy and materials through an ecosystem